typo3 loops or something eats my RAM

I have an typo3 syte. And after a hack there is somenthing strange. The site is moved on a new server. But when I start the site, then anythig loops or does somethings, that my 4GB ram is used to 100% in 30 seconds. Does anyone has an indea where to look, or how to see where the problem is? Is there any software where I can install to track this. It's a debian linux.

Whne I disable the access to the site with htaccess and allow it only for my IP address, then开发者_开发技巧 everything works fine. I can play with the site and the usage of the RAM is ok. I have made som apache benchmarks from my IP address to the homepage and everything ist fine, but when I allow the acccess to the "world", the the server is down in 30 seconds :-(

Thanks for each answer!

Cheers Nik

Thanks!

Are you using PHP via mod_php of FastCGI?

What is the setting in TYPO3_LOCAL_CONF['extCache'] (use the install tool to check).

What extensions are you using? Are you sure all your pages can be cached? Sometimes extensions prevent caching if they are set to USER_INT=1.

Have you tried benchmarking it using wget? (wget -r http://yoursite.local).

First of all You should enable and check Apache logs.

Also it could be mis-configuration of MySQL server.